libgloss/arc/hl/hl_argv.c

   1 /*
   2  * hl_argv.c -- provide _argv().
   3  *
   4  * Copyright (c) 2024 Synopsys Inc.
   5  *
   6  * The authors hereby grant permission to use, copy, modify, distribute,
   7  * and license this software and its documentation for any purpose, provided
   8  * that existing copyright notices are retained in all copies and that this
   9  * notice is included verbatim in any distributions. No written agreement,
  10  * license, or royalty fee is required for any of the authorized uses.
  11  * Modifications to this software may be copyrighted by their authors
  12  * and need not follow the licensing terms described here, provided that
  13  * the new terms are clearly indicated on the first page of each file where
  14  * they apply.
  15  *
  16  */
  17
  18 #include <stddef.h>
  19
  20 #include "hl_toolchain.h"
  21 #include "hl_api.h"
  22
  23 /* Get buffer length for argv[a] using HL_SYSCALL_ARGV.  */
  24 static __always_inline uint32_t
  25 _hl_argvlen (int a)
  26 {
  27   uint32_t ret = 0;
  28   volatile __uncached char *p;
  29
  30   p = _hl_message (HL_SYSCALL_ARGV, "i", (uint32_t) a);
  31   if (p != NULL)
  32     ret = _hl_get_ptr_len (p);
  33
  34   _hl_delete ();
  35
  36   return ret;
  37 }
  38
  39 /* Implements HL_SYSCALL_ARGV.  */
  40 static __always_inline int
  41 _hl_argv (int a, char *arg)
  42 {
  43   int ret = 0;
  44   volatile __uncached char *p;
  45
  46   p = _hl_message (HL_SYSCALL_ARGV, "i:s", (uint32_t) a, (char *) arg);
  47   if (p == NULL)
  48     ret = -1;
  49
  50   _hl_delete ();
  51
  52   return ret;
  53 }
  54
  55 /* See arc-main-helper.c.  */
  56 uint32_t
  57 _argvlen (int a)
  58 {
  59   return _hl_argvlen (a);
  60 }
  61
  62 /* See arc-main-helper.c.  */
  63 int
  64 _argv (int a, char *arg)
  65 {
  66   return _hl_argv (a, arg);
  67 }